API 参考
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    枚举 Alphabet

    字符集

    索引

    枚举成员

    COMPLEX: "-0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
    DEFAULT: "0123456789abcdefghijklmnopqrstuvwxyz"
    ONLY_CHAR: "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
    ONLY_NUMBER: "0123456789"